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STOCK-BASED COMPENSATION PLANS (Restricted Stock Awards and Performance Stock Units Excluding the Cash Component) (Details) - Restricted stock units and performance stock units excluding the cash component - $ / shares
12 Months Ended
Aug. 31, 2019
Aug. 31, 2018
Aug. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding number, beginning balance 1,800,718 2,453,580 2,700,230
Granted, number 1,505,449 1,216,461 1,462,442
Vested, number (992,167) (1,685,898) (1,385,753)
Forfeited, number (34,432) (183,425) (323,339)
Outstanding number, ending balance 2,279,568 1,800,718 2,453,580
Outstanding, weighted average grant-date fair value, beginning balance $ 16.82 $ 15.65 $ 16.49
Granted, weighted average grant-date fair value 17.75 20.69 16.17
Vested, weighted average grant-date fair value 20.09 18.00 17.62
Forfeited, weighted average grant-date fair value 17.90 15.89 16.58
Outstanding, weighted average grant-date fair value, ending balance $ 15.99 $ 16.82 $ 15.65